The Oklahoma District State Tartan was officially recognized by Oklahoma in 1999. Designed by Oklahoma native Jerrel R. Murray, the colors of red, white, black and gold on a field of blue are symbolic of the people, agricultural products, manufactured products, and natural resources of Oklahoma.

Illustration of classic Scot in kilt from Scottish Tartans Authority

Tartan refers to fabric woven into plaid patterns representing clans (families) or regions in Scotland.

In old Scotland, the tartan was used for clothing and as a banner or flag. Because a family or community worked the cloth together, their clothing was made of the same patterns, and so a person could be recognized by the Tartan plaid that he wore. Tartans can also be designed as a symbol commemorating a special event or person.

Source:

Tartans of Scotland
Scottish Tartans Museum; History

Links:

Cultural Symbols - 50 states